The BPF-2A-500 SQ from Crane Aerospace & Electronics is a Modulator with RF Frequency 10 to 1000 MHz, Carrier Suppression -40 dBc, Insertion Loss 3 dB, Amplitude Balance 0.2 dB, Current -15 to 15 mA. Tags: Flat Pack. More details for BPF-2A-500 SQ can be seen below.